Best way to decrease the internal volume of a sealed speaker?

asvjerry,

Thank you so much for your information. I am now leaning towards the higher volume 0.65 internals. This means I only need to reduce the inside by 173.

I guess the only issue I have with using 4x4’s is that they would probably need to be just glued at the top inside. And then the  cabinet with the 4X4’s glued would be placed on its back to finish the speaker / front baffle install until it can be uprighted again to rest on the stand.
So, I am not sure how well a glued 4x4(s) would stay stationary during that movement. Does liquid nails work that great?

ozzy

Oz, I'm not a big fan of Liquid Nails...I'd suggest a tube of 'fast set' silicone caulk, applied 'bout the diameter of toothpaste... Somewhat 'stinky' (acetic acid, a.k.a. vinegar...*L* Fades away soon enough...) but not toxic to you or electronics....

Sets up in about an hour...since the 4x4 pieces are small, there shouldn't be any issues.  You could cut the 4x4 into smaller pieces (2, 3, etc.) to make it less of a 'hunk', and distribute them within the cab.  Smaller will be less likely to come loose, regardless of how loud you push them... ;)

BTW, re the 4x4....try to select one that's as 'dry' as possible.  If they're all 'wet', let it sit for awhile either in the sun or indoors in a warm space.  4x4s' are typically pressure treated for exterior use and can be moist.  It's a copper-based solution; again, safe to you and gadgets.  If the wood's dry(er), the silicone will adhere better....

Have fun, mind your fingers around the saws....;)

Ozzy,

1 gallon displaces 241 cubic inches. So a gallon of Cascade when cured should shrink down to the volume you require..you would need a gallon for each box..They would be well sealed and more rigid. Tom 

Why not simply get a quantum device from Geoff or an air compliance device from Bybee?

Why bother fiddling with foam, glue and other physical stuff and having to open up the speaker.

Simply employ one of these quantum mechanical devces to warp the space time dimensions of your speakers or change the actual behaviour of air compliance of your entire room to have the same desired effect.

Engineering by length, volume and acoustic properties is so old school.

Alternatively your speaker wires can be useful in changing speaker response as effectively as any physical change. A change of 1 meter in cable length is just like a volume change of 1 liter.

Alternatively, your thanksgiving turkey is perfect for stuffing a speaker but may work even better if placed on your head.

Here is a DIY instruction video

https://m.youtube.com/watch?v=E_Rabq4muu0

Ozzy

I take that back ..3 coats would be enough..30 coats would take weeks to cure. Though the volume would be right. Tom